Subsequent Events (Unaudited) (Details) - Subsequent Event - February 2, 2016 Plan $ in Millions	Feb. 02, 2016 USD ($) Person
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated | Person	925
Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 85
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	95
One-time Termination Benefits | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	77
One-time Termination Benefits | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	85
Lease Termination | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	8
Lease Termination | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 10