XML 113 R76.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Debt - Additional Information (Detail) | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2017 USD ($) | Aug. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) | Mar. 31, 2017 | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Early Repayment of Subordinated Debt |  |  |  | $ 635,600,000 |  | $ 18,200,000 | $ 19,300,000
Gain (Loss) on Derivative Instruments, Net, Pretax |  |  |  | 0 |  | (20,000,000) | (20,700,000)
Debt Instrument, Periodic Payment, Principal in Next Twelve Months |  |  | $ 25,000,000 | $ 25,000,000 |  |  |
Debt Instrument, Number of Subsidiaries, one hundred percent of common stock as collateral |  |  | 3 | 3 |  |  |
Discretionary Line of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  | 30 days |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 250,000,000 | $ 250,000,000 |  |  |
Proceeds from Lines of Credit |  |  |  | 0 |  | 0 |
Discretionary Line of Credit | Federal Funds Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis points |  |  | 0.50% |  | 0.50% |  |
Terminated Discretionary Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 100,000,000 |  |  |  |  |  |
4.125% Senior Notes due 2047 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 850,000,000 |  | $ 850,000,000 | $ 850,000,000 |  | 0 |
Debt Instrument, Interest Rate, Stated Percentage | 4.125% |  | 4.125% | 4.125% |  |  |
Proceeds from Debt, Net of Issuance Costs | $ 841,100,000 |  |  |  |  |  |
Debt Related Commitment Fees and Debt Issuance Costs | $ 1,500,000 |  |  |  |  |  |
2.45% Senior Notes Due 2027 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 500,000,000 | $ 500,000,000 | $ 500,000,000 |  | 500,000,000 |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.45% | 2.45% | 2.45% |  |  |
Proceeds from Debt, Net of Issuance Costs |  | $ 495,600,000 |  |  |  |  |
Debt Related Commitment Fees and Debt Issuance Costs |  | 900,000 |  |  |  |  |
6.70% Fixed-to-Floating Rate Junior Subordinated Debentures due 2067 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 0 | $ 0 |  | 1,000,000,000 |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.70% | 6.70% |  |  |
Early Repayment of Subordinated Debt |  |  |  | $ 30,900,000 |  | 19,800,000 |
Gains (losses) on extinguishment of debt |  |  |  | 200,000 |  | 1,600,000 |
Trust Preferred Debt Securities and Senior Notes [Member] | Other Debt Instruments [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Debt |  |  |  | $ 65,200,000 |  |  |
Loans Payable [Member] | Fixed Rate, Five Year Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  | 5 years |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Notes Payable, Other Payables [Member] | Other Debt Instruments [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis points |  |  |  | 2.25% |  |  |
Designated as Hedging Instrument [Member] | Ineffective Cash Flow Hedge [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  |  |  | $ 0 |  | $ (1,300,000) | $ 200,000
Designated as Hedging Instrument [Member] | Ineffective Cash Flow Hedge [Member] | 2.45% Senior Notes Due 2027 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | $ (1,400,000) |  | (1,400,000) |  |  |
debt extinguishment [Member] | 6.70% Fixed-to-Floating Rate Junior Subordinated Debentures due 2067 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Early Repayment of Subordinated Debt |  |  |  | $ 563,700,000 |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Represents the charge against earnings during the period for commitment fees and debt issuance expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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