Income Taxes Deferred Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets (Liabilities) [Abstract]
Depreciation and amortization	$ (4,024.8)	$ (4,468.8)
Net operating loss and credit carryforwards	1,083.3	941.9
Reserves and accruals	185.9	163.1
Accrued compensation	312.9	339.1
Inventory basis difference	83.3	96.6
Other capitalized costs	167.9	116.0
Other, net	85.7	77.0
Deferred tax assets (liabilities), net before valuation allowance	(2,105.8)	(2,735.1)
Valuation allowance	108.9	116.2
Deferred tax assets (liabilities), net	$ (2,214.7)	$ (2,851.3)