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Employee Benefit Plan Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 23, 2018	Feb. 24, 2017	Feb. 26, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Obligation	$ 23.9	$ 23.8
Deferred Compensation Liability, Current and Noncurrent	55.2	49.2
Employee Benefit Plan Obligations, Total	169.5	169.1
Defined Benefit Plan, Assets for Plan Benefits	0.5	0.2
Employee benefit plan obligations	39.2	35.0
Liability, Defined Benefit Plan, Noncurrent	(130.8)	(134.3)
Liability, Defined Benefit Plan	170.0	169.3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	46.7
Defined Benefit Plan, Fair Value of Plan Assets	33.1	46.7
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(16.1)	(15.0)	$ (10.3)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	9.4	12.2
Pension and other post-retirement liability adjustments	1.1	4.7	2.6
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	(3.2)	0.8
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	0.0
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	0.0
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	0.2
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	(0.2)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	3.8	3.7
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0.0	0.0
Defined Benefit Plan, Plan Assets, Administration Expense	0.0	0.0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	43.4	46.0
Employee benefit plan obligations	3.5	3.9
Liability, Defined Benefit Plan, Noncurrent	(39.9)	(42.1)
Liability, Defined Benefit Plan	43.4	46.0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0.0	0.0
Defined Benefit Plan, Plan Assets, Contributions by Employer	3.4	5.2
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1.9	2.3
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31)	0.1	0.1
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	0.0	0.0
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	0.0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	46.0	66.2
Defined Benefit Plan, Service Cost	0.2	0.5	0.7
Defined Benefit Plan, Interest Cost	1.7	2.8	2.6
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(1.2)	(18.3)
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	0.1	0.0
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets	(5.4)	(7.6)
Defined Benefit Plan, Benefit Obligation	43.4	46.0	66.2
Defined Benefit Plan, Funded (Unfunded) Status of Plan	43.4	46.0
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(26.0)	(28.4)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(28.3)	(37.7)
Defined Benefit Plan, Amortization of Gain (Loss)	(3.7)	(0.8)	0.1
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(7.0)	(8.6)	(9.0)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0.0	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0.0	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(8.8)	(6.1)	(5.6)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(1.2)	(18.3)	(7.0)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	(2.3)	(9.3)
Pension and other post-retirement liability adjustments	(9.5)	8.9	(1.9)
Total recognized in net periodic benefit cost and other comprehensive income (loss) before tax	0.7	(15.0)	(3.7)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	(3.7)	(0.8)	0.1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	7.0	8.6	9.0
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation	$ 0.0	$ 0.0	$ 0.0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.97%	3.86%	4.34%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.84%	4.29%	3.72%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ (0.3)	$ (7.6)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0.1	0.0
Defined Benefit Plan, Plan Assets, Administration Expense	(0.2)	(0.2)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	47.0	50.1
Employee benefit plan obligations	3.9	3.6
Liability, Defined Benefit Plan, Noncurrent	(43.6)	(46.7)
Liability, Defined Benefit Plan	47.0	50.1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	46.7	47.3
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	2.4	4.7
Defined Benefit Plan, Plan Assets, Contributions by Employer	4.5	6.0
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0.0	0.0
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31)	0.0	0.0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	3.6	(2.7)
Defined Benefit Plan, Fair Value of Plan Assets	33.1	46.7	$ 47.3
Defined Benefit Plan, Plan Assets, Benefits Paid	23.9	8.4
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	96.8	93.4
Defined Benefit Plan, Service Cost	2.7	2.8	3.1
Defined Benefit Plan, Interest Cost	2.1	3.1	3.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(3.3)	9.4
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	5.8	(3.5)
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets	(23.9)	(8.4)
Defined Benefit Plan, Benefit Obligation	80.1	96.8	93.4
Defined Benefit Plan, Funded (Unfunded) Status of Plan	47.0	50.1
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	12.7	23.4
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	12.2	22.7
Defined Benefit Plan, Amortization of Gain (Loss)	0.5	0.7	0.9
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.2)	(0.2)	(0.2)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1.4)	(1.9)	(2.5)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	7.1	0.9	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	10.8	5.4	4.3
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(4.3)	6.9	(2.4)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	(0.5)	(0.7)
Pension and other post-retirement liability adjustments	11.9	(5.4)	3.1
Total recognized in net periodic benefit cost and other comprehensive income (loss) before tax	(1.1)	10.8	1.2
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	0.5	1.7	0.9
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	0.2	0.2	0.2
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation	$ (7.3)	$ 0.0	$ 0.0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.90%	2.90%	3.30%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.60%	2.70%	2.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.80%	3.60%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.80%	4.30%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.50%	2.80%	2.80%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ (5.0)
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	(4.4)
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	(3.7)
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	(3.7)
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	(4.5)
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	(25.6)
Non-Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan obligations	3.8	$ 3.5
Liability, Defined Benefit Plan, Noncurrent	(28.8)	(30.3)
Liability, Defined Benefit Plan	32.6	33.8
Defined Benefit Plan, Accumulated Benefit Obligation	32.4	33.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	33.8
Defined Benefit Plan, Benefit Obligation	32.6	33.8
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(32.6)	(33.8)
Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	7.1
After Medicare Act Subsidy [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	(3.6)
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	(3.6)
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	(3.5)
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	(3.5)
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	(3.5)
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	(16.1)
Short term asset [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0
Short term asset [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.0
Short term asset [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.2
Short term asset [Member] | Non-Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.0
Long term asset [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.5	0.0
Long term asset [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.0
Long term asset [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.5	0.0
Long term asset [Member] | Non-Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.0
Foreign Plan [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.5
Employee benefit plan obligations	0.1	0.1
Liability, Defined Benefit Plan, Noncurrent	(14.8)	(16.4)
Liability, Defined Benefit Plan	14.4	16.3
Defined Benefit Plan, Accumulated Benefit Obligation	42.5	51.0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	38.8
Defined Benefit Plan, Fair Value of Plan Assets	33.1	38.8
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	55.1
Defined Benefit Plan, Benefit Obligation	47.5	55.1
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(14.4)	(16.3)
Foreign Plan [Member] | Short term asset [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.2
Foreign Plan [Member] | Long term asset [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.5	0.0
Domestic Plan [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan obligations		0.0
Liability, Defined Benefit Plan, Noncurrent		0.0
Liability, Defined Benefit Plan		0.0
Defined Benefit Plan, Accumulated Benefit Obligation		7.9
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	7.9
Defined Benefit Plan, Fair Value of Plan Assets		7.9
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	$ 7.9
Defined Benefit Plan, Benefit Obligation		7.9
Defined Benefit Plan, Funded (Unfunded) Status of Plan		0.0
Domestic Plan [Member] | Short term asset [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits		0.0
Domestic Plan [Member] | Long term asset [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits		$ 0.0

X

- Definition

Defined Contribution Obligation

+ References

No definition available.

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X

- Definition

Total as of balance sheet date of all employee benefit plan obligations, including defined contribution, post-retirement, defined benefit, and deferred compensation plans.

+ References

No definition available.

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- Definition

Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax

+ References

No definition available.

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- Definition

Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Gains (Losses) recognized as part of the curtailment/settlement

+ References

No definition available.

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- Definition

Aggregate of the amounts recognized in net periodic benefit cost and other comprehensive income (loss) before tax

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No definition available.

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

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- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount of (increase) decrease in accumulated benefit obligation of defined benefit plan from effects of settlement and curtailment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (r)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (j)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

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- Definition

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount of administration expense of defined benefit plan which decreases plan assets. Excludes plan administration expense paid by employer.

+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(4)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(5)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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