Changes in Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance January 1	$ (129.5)
Other comprehensive income (loss) before reclassifications	(83.1)
Amounts reclassified from accumulated other comprehensive income (loss)	21.0
Other comprehensive income (loss)	(62.1)
Balance December 31	(191.6)	(129.5)
Reclassification out of Accumulated Other Comprehensive Income [Abstract]
Income Before Income Taxes and Income (Loss) From Equity Method Investments	1,660.9	1,659.6	1,549.0
Income Tax Expense	565.2	527.1	505.8
Net Income	1,111.6	1,117.5	1,060.4
Unrealized Gain (Loss) on Available-for-Sale Securities
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance January 1	(2.0)
Other comprehensive income (loss) before reclassifications	0.4
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive income (loss)	0.4
Balance December 31	(1.6)
Defined Benefit Pension and Postemployment Plans
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance January 1	(89.8)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	21.0
Other comprehensive income (loss)	21.0
Balance December 31	(68.8)
Defined Benefit Pension and Postemployment Plans | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Abstract]
Prior service cost	5.5
Actuarial (gains) losses	5.0
Income Before Income Taxes and Income (Loss) From Equity Method Investments	10.5
Income Tax Expense	4.2
Net Income	6.3
Foreign Currency Translation
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance January 1	(37.7)
Other comprehensive income (loss) before reclassifications	(83.5)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive income (loss)	(83.5)
Balance December 31	$ (121.2)