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Operating Leases	12 Months Ended
Operating Leases	Dec. 31, 2016
Operating Leases
Operating Leases	16. Operating Leases Rent expense attributable to all warehouse, office buildings and equipment operating leases was $80 million in 2016, $72 million in 2015, and $63 million in 2014. Minimum future rentals under operating leases are as follows: 2017, $65 million; 2018, $47 million; 2019, $32 million; 2020, $23 million; 2021, $14 million; and 2022 and thereafter, $24 million.