Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 5,457.0	$ 1.4	$ 41.1	$ 5,563.2	$ (155.6)	$ 5,450.1	$ 6.9
Cash dividends declared per share	$ 0.600
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 2,909.9	0.0	0.0	2,910.3	0.0	2,910.3	(0.4)
Other comprehensive income/(loss)	188.5				188.5	188.5	0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	118.0	0.0	118.0	0.0	0.0	118.0	0.0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	33.4	0.0	33.4	0.0	0.0	33.4	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	15.3	0.0	15.3	0.0	0.0	15.3	0.0
Stock Repurchased and Retired During Period, Value	(3,171.4)		(166.7)	(3,004.7)	0.0	(3,171.4)	0.0
Dividends, Cash	(833.0)	0.0	0.0	(833.0)	0.0	(833.0)	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 5,758.9	1.4	41.1	5,834.9	(125.3)	5,752.1	6.8
Cash dividends declared per share	$ 0.300
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 659.8	0.0	0.0	660.1	0.0	660.1	(0.3)
Other comprehensive income/(loss)	158.2	0.0	0.0	0.0	158.2	158.2	0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	55.8	0.0	55.8	0.0	0.0	55.8	0.0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	42.5	0.0	42.5	0.0	0.0	42.5	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	7.9	0.0	7.9	0.0	0.0	7.9	0.0
Stock Repurchased and Retired During Period, Value	(1,553.2)		(106.2)	(1,447.0)	0.0	(1,553.2)	0.0
Dividends, Cash	(412.2)	0.0	0.0	(412.2)	0.0	(412.2)	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	4,717.7	1.4	41.1	4,635.8	32.9	4,711.2	6.5
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,175.8	1.3	41.1	1,457.4	(330.3)	1,169.5	6.3
Cash dividends declared per share	$ 0.720
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,419.0	0.0	0.0	1,423.6	0.0	1,423.6	(4.6)
Other comprehensive income/(loss)	58.8				58.8	58.8	0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	194.0	0.0	194.0	0.0	0.0	194.0	0.0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	203.0	0.0	203.0	0.0	0.0	203.0	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	16.4	0.0	16.4	0.0	0.0	16.4	0.0
Stock Repurchased and Retired During Period, Value	(7,713.2)	(0.1)	(413.4)	(7,299.7)	0.0	(7,713.2)	0.0
Dividends, Cash	(884.6)	0.0	0.0	(884.6)	0.0	(884.6)	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (2,878.8)	1.2	41.1	(2,584.0)	(343.2)	(2,884.9)	6.1
Cash dividends declared per share	$ 0.360
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 658.8	0.0	0.0	663.2	0.0	663.2	(4.4)
Other comprehensive income/(loss)	71.7	0.0	0.0	0.0	71.7	71.7	0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	96.0	0.0	96.0	0.0	0.0	96.0	0.0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	158.0	0.0	158.0	0.0	0.0	158.0	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	8.3	0.0	8.3	0.0	0.0	8.3	0.0
Stock Repurchased and Retired During Period, Value	(2,713.2)	0.0	(262.3)	(2,450.9)	0.0	(2,713.2)	0.0
Dividends, Cash	(436.0)	0.0	0.0	(436.0)	0.0	(436.0)	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(5,035.2)	1.2	41.1	(4,807.7)	(271.5)	(5,036.9)	1.7
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 495.6	$ 0.0	$ 0.0	$ 495.6	$ 0.0	$ 495.6	$ 0.0