Condensed Consolidated Statements of Equity - USD ($) shares in Millions, $ 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	$ 1,175.8	$ 1.3	$ 41.1	$ 1,457.4	$ (330.3)	$ 1,169.5	$ 6.3
Common Stock, Shares, Outstanding		1,309.1
Cash dividends declared per share	$ 0.72
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	0.0	0.0	0.0	58.8	58.8	0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	194.0	0.0	194.0	0.0	0.0	194.0	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	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
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		10.0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.2
Stock Repurchased and Retired During Period, Shares		(109.3)
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
Common Stock, Shares, Outstanding		1,243.2
Cash dividends declared per share	$ 0.36
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
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	96.0	0.0	96.0	0.0	0.0	96.0	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	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
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		4.0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.1
Stock Repurchased and Retired During Period, Shares		(37.3)
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
Common Stock, Shares, Outstanding		1,210.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (6,231.0)	$ 1.2	41.1	(5,771.2)	(503.3)	(6,232.2)	1.2
Common Stock, Shares, Outstanding		1,184.6
Cash dividends declared per share	$ 0.82
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,210.1	$ 0.0	0.0	1,214.1	0.0	1,214.1	(4.0)
Other comprehensive income/(loss)	(23.3)	0.0	0.0	0.0	(23.3)	(23.3)	0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	148.4	0.0	148.4	0.0	0.0	148.4	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(40.5)	0.0	(40.5)	0.0	0.0	(40.5)	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	18.5	0.0	18.5	0.0	0.0	18.5	0.0
Stock Repurchased and Retired During Period, Value	(1,675.0)	0.0	(126.4)	(1,548.6)	0.0	(1,675.0)	0.0
Dividends, Cash	(957.4)	$ 0.0	0.0	(957.4)	0.0	(957.4)	0.0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		3.6
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.2
Stock Repurchased and Retired During Period, Shares		(20.3)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (6,759.1)	$ 1.2	41.1	(6,414.8)	(387.4)	(6,759.9)	0.8
Common Stock, Shares, Outstanding		1,174.5
Cash dividends declared per share	$ 0.41
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 324.8	$ 0.0	0.0	328.4	0.0	328.4	(3.6)
Other comprehensive income/(loss)	(134.4)	0.0	0.0	0.0	(134.4)	(134.4)	0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	57.1	0.0	57.1	0.0	0.0	57.1	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	13.6	0.0	13.6	0.0	0.0	13.6	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	9.6	0.0	9.6	0.0	0.0	9.6	0.0
Stock Repurchased and Retired During Period, Value	(567.1)	0.0	(80.3)	(486.8)	0.0	(567.1)	0.0
Dividends, Cash	(477.4)	$ 0.0	0.0	(477.4)	0.0	(477.4)	0.0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0.8
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.1
Stock Repurchased and Retired During Period, Shares		(7.3)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(7,532.9)	$ 1.2	41.1	(7,050.6)	(521.8)	(7,530.1)	(2.8)
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 17.3	$ 0.0	$ 0.0	$ 12.5	$ 4.8	$ 17.3	$ 0.0
Common Stock, Shares, Outstanding		1,168.1