Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accounts and wages payable	$ 602	$ 748
Casualty and other claims	174	187
Vacation liability	135	132
Other	109	110
Total	1,091	1,233
Interest payable	123	118
Other	98	96
Total	237	228
Conrail Inc [Member]
Due to Conrail	71	56
Net pension benefit obligations
Pension benefit obligations	$ 16	$ 14