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Share-Based Compensation Plans - Schedule of Grants and Weighted-average Per Share (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares granted, options and non-options	535	498
Weighted-average per share value, options and non-options	$ 56.04	$ 58.36
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, options	166	147
Weighted-average per share fair value, options	$ 19.68	$ 21.66
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, non-options	8	8
Weighted-average per share fair value, non-options	$ 84.29	$ 68.17
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, non-options	231	178
Weighted-average per share fair value, non-options	$ 73.02	$ 74.19
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, non-options	130	165
Weighted-average per share fair value, non-options	$ 70.35	$ 73.61

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Instruments, Grants in Period

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Instruments, Grants in Period, Weighted Average Grant Date Fair Value

+ References

No definition available.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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