Property, Plant And Equipment (Payments Due Under Operating And Capital Leases Net Of Sublease Amounts And Non-Cancellable Future Rentals) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Property, Plant And Equipment [Abstract]
Minimum operating lease payments, net of sublease amounts, 2012	$ 202
Minimum operating lease payments, net of sublease amounts, 2013	180
Minimum operating lease payments, net of sublease amounts, 2014	152
Minimum operating lease payments, net of sublease amounts, 2015	100
Minimum operating lease payments, net of sublease amounts, 2016	81
Future rentals due from customers for equipment on operating leases, 2012	15
Future rentals due from customers for equipment on operating leases, 2013	14
Future rentals due from customers for equipment on operating leases, 2014	13
Future rentals due from customers for equipment on operating leases, 2015	13
Future rentals due from customers for equipment on operating leases, 2016	10
Minimum capital lease payments, net of sublease amounts, 2012	91
Minimum capital lease payments, net of sublease amounts, 2013	73
Minimum capital lease payments, net of sublease amounts, 2014	25
Minimum capital lease payments, net of sublease amounts, 2015	6
Minimum capital lease payments, net of sublease amounts, 2016	$ 1