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Cash Paid for Interest and Taxes	9 Months Ended
Cash Paid for Interest and Taxes	Sep. 30, 2019
Supplemental Cash Flow Information [Abstract]
Cash Paid for Interest and Taxes	Cash Paid for Interest and Taxes Cash paid for interest was $59 million and $52 million for the nine months ended September 30, 2019 and 2018, respectively. Income tax payments, net of refunds, were $180 million and $66 million during the nine-month periods ended September 30, 2019 and 2018, respectively.