Segment Information (Reconciliation Of Segment Information To Total Consolidated Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total revenues	$ 2,962.2	$ 2,560.7	$ 5,681.7	$ 4,752.0
Segment profitability	473.4	410.9	700.6	516.5
Operating Segment
Segment Reporting Information [Line Items]
Total revenues	2,926.5	2,539.9	5,613.9	4,716.0
Other revenue
Segment Reporting Information [Line Items]
Total revenues	35.7	20.8	67.8	36.0
Intersegment
Segment Reporting Information [Line Items]
Total revenues			(358.2)	(251.9)
Corporate / Other
Segment Reporting Information [Line Items]
Total revenues	(203.1)	(135.3)	(358.2)	(251.9)
Segment profitability	(650.9)	(566.0)	(1,323.8)	(1,188.4)
North America Segment
Segment Reporting Information [Line Items]
Total revenues	1,335.4	1,428.1	2,586.8	2,605.9
North America Segment | Operating Segment
Segment Reporting Information [Line Items]
Total revenues	1,279.6	1,401.5	2,494.5	2,559.0
Segment profitability	645.0	782.7	1,234.7	1,356.5
North America Segment | Other revenue
Segment Reporting Information [Line Items]
Total revenues	23.9	18.7	47.3	32.7
North America Segment | Intersegment
Segment Reporting Information [Line Items]
Total revenues	31.9	7.9	45.0	14.2
Europe Segment
Segment Reporting Information [Line Items]
Total revenues	1,046.3	627.0	1,987.9	1,236.6
Europe Segment | Operating Segment
Segment Reporting Information [Line Items]
Total revenues	954.3	600.9	1,846.3	1,185.2
Segment profitability	252.7	117.9	486.5	242.5
Europe Segment | Other revenue
Segment Reporting Information [Line Items]
Total revenues	9.4		16.1	0.6
Europe Segment | Intersegment
Segment Reporting Information [Line Items]
Total revenues	82.6	25.6	125.5	50.8
Rest of World Segment
Segment Reporting Information [Line Items]
Total revenues	783.6	640.9	1,465.2	1,161.4
Rest of World Segment | Operating Segment
Segment Reporting Information [Line Items]
Total revenues	692.6	537.5	1,273.1	971.8
Segment profitability	226.6	76.3	303.2	105.9
Rest of World Segment | Other revenue
Segment Reporting Information [Line Items]
Total revenues	2.4	1.6	4.4	2.7
Rest of World Segment | Intersegment
Segment Reporting Information [Line Items]
Total revenues	$ 88.6	$ 101.8	$ 187.7	$ 186.9