Equity Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	$ (1,120.9)	$ (714.3)
Other comprehensive income before reclassifications	50.5	(237.0)
Amounts reclassified from accumulated other comprehensive income	26.6	29.9
Provision for income taxes	(10.1)	(11.7)
Net current period other comprehensive income (loss)	67.0	(218.8)
Balance at September 30:	(1,053.9)	(933.1)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	(495.6)	(52.3)
Other comprehensive income before reclassifications	34.1	(243.8)
Amounts reclassified from accumulated other comprehensive income	0.0	0.0
Provision for income taxes	0.0	0.0
Net current period other comprehensive income (loss)	34.1	(243.8)
Balance at September 30:	(461.5)	(296.1)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	5.1	3.1
Other comprehensive income before reclassifications	6.6	0.3
Amounts reclassified from accumulated other comprehensive income	(1.7)	1.6
Provision for income taxes	(0.5)	(0.5)
Net current period other comprehensive income (loss)	4.4	1.4
Balance at September 30:	9.5	4.5
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	(630.4)	(665.1)
Other comprehensive income before reclassifications	9.8	6.5
Amounts reclassified from accumulated other comprehensive income	28.3	28.3
Provision for income taxes	(9.6)	(11.2)
Net current period other comprehensive income (loss)	28.5	23.6
Balance at September 30:	$ (601.9)	$ (641.5)