Equity Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Balance at December 31:	$ (166.7)	$ (521.0)
Other comprehensive income before reclassifications	(45.6)	(106.1)
Amounts reclassified from accumulated other comprehensive income	21.9	40.5
Tax (expense) benefit	(7.0)	(12.0)
Balance at June 30:	(197.4)	(598.6)
Cash flow hedges and marketable securities [Member]
Balance at December 31:	0.4	(1.4)
Other comprehensive income before reclassifications	1.6	7.5
Amounts reclassified from accumulated other comprehensive income	2.5	6.9
Tax (expense) benefit	(0.5)	(0.5)
Balance at June 30:	4.0	12.5
Pension and OPEB Adjustments [Member]
Balance at December 31:	(562.8)	(964.2)
Other comprehensive income before reclassifications	(3.1)	15.0
Amounts reclassified from accumulated other comprehensive income	19.4	33.6
Tax (expense) benefit	(6.5)	(11.5)
Balance at June 30:	(553.0)	(927.1)
Foreign Currency Gain (Loss) [Member]
Balance at December 31:	395.7	444.6
Other comprehensive income before reclassifications	(44.1)	(128.6)
Amounts reclassified from accumulated other comprehensive income	0	0
Tax (expense) benefit	0	0
Balance at June 30:	$ 351.6	$ 316.0