Leases And Commitments (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
---|---|---|---|---|
Mar. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Rent expense for operating leases | $ 220 | $ 209 | $ 181 | |
Maximum | ||||
Lessee leasing arrangements, operating leases, term of contract (in years) | 20 years | |||
Minimum | ||||
Warranty period terms minimum | 90 days | 90 days |