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Asset Impairment, Exit, and Restructuring Costs	9 Months Ended
Asset Impairment, Exit, and Restructuring Costs	Sep. 30, 2021
Restructuring, Settlement and Impairment Provisions [Abstract]
Asset Impairment, Exit, and Restructuring Costs	Asset Impairment, Exit, and Restructuring Costs Asset impairment, exit, and restructuring costs in the three months ended September 30, 2021 consisted of $2 million of restructuring charges, presented as specified items within segment operating profit. Asset impairment, exit, and restructuring costs in the nine months ended September 30, 2021 consisted of $54 million of impairments related to certain long-lived assets and $26 million of restructuring charges, presented as specified items within segment operating profit, and $4 million of restructuring charges in Corporate. Long-lived assets held for sale with a net book value of $0.1 billion were not considered impaired as of September 30, 2021. Asset impairment, exit, and restructuring costs in the three months ended September 30, 2020 consisted of individually insignificant long-lived asset impairments of $3 million and restructuring charges of $1 million. Asset impairment, exit, and restructuring costs in the nine months ended September 30, 2020 consisted of $50 million of impairments related to certain intangible and other long-lived assets and $11 million of restructuring charges.