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New Accounting Standard - Future Minimum Payments for Leases (Details) - USD ($)
Mar. 31, 2019
Jan. 01, 2019
Operating Lease Liabilities, Payments Due [Abstract]    
Remaining nine months of 2019 $ 36,000,000  
2020 45,000,000  
2021 39,000,000  
2022 33,000,000  
2023 30,000,000  
Thereafter 155,000,000  
Total payments 338,000,000  
Less amount representing interest (82,000,000)  
Total lease liabilities 256,000,000 $ 243,000,000
Less current portion (33,000,000)  
Long-term portion $ 223,000,000