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United Kingdom Energy Crisis and Impairment Charges (Tables) | 9 Months Ended
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Sep. 30, 2021
Restructuring and Related Activities [Abstract] |
Schedule of Asset Impairment Assumptions | Assuming that all other assumptions utilized in our expected cash flows and the other inputs used in our long-lived asset and goodwill impairment tests remain unchanged, a change in each of these three inputs would have the following effect on the amount of long-lived asset and goodwill impairment recognized in the three months ended September 30, 2021:
| Increase/(Decrease) in |  | Increase/(Decrease) in
| Long-lived Asset Impairment |  | Goodwill Impairment
Assumption | (in millions)
| +$5.00 |  | -$5.00 |  | +$5.00 |  | -$5.00
Average Selling Price per Product Ton | $ | (87) |  |  | $ | 8 |  |  | $ | (20) |  |  | $ | 25 |
| +$0.50 |  | -$0.50 |  | +$0.50 |  | -$0.50
Natural Gas Cost per MMBtu(1) | $ | 7 |  |  | $ | (33) |  |  | $ | 20 |  |  | $ | (53) |
| +50 bps |  | -50 bps |  | +50 bps |  | -50 bps
Discount Rate | $ | 1 |  |  | $ | (1) |  |  | $ | 14 |  |  | $ | (22) |
_______________________________________________________________________________ (1)The sensitivity impact of a $0.50/MMBtu increase or decrease in the cost of natural gas includes any corresponding impact to selling prices from contractually stipulated sales provisions.

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