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Debt and Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Mar. 23, 2022 | Apr. 30, 2022 | Apr. 29, 2022 | Jul. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  |  |  | $ 9,621 |  | $ 9,450
Interest costs |  |  |  |  | $ 153 | $ 160 |
Treasury stock purchases (in shares) |  |  |  |  | 12.3 |  |
Cost per share repurchased (in dollars per share) |  |  |  |  | $ 44.02 |  |
Shares repurchased |  |  |  |  | $ 541 |  |
Dividends declared per share of common stock (in dollars per share) | $ 0.15 |  |  |  | $ 0.15 | $ 0.075 |
Base cash dividend (in dollars per share) | 0.075 |  |  |  |  |  |
Variable cash dividend (in dollars per share) | $ 0.075 |  |  |  |  |  |
Subsequent event |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Treasury stock purchases (in shares) |  |  | 28.7 |  |  |  |
Cost per share repurchased (in dollars per share) |  |  | $ 41.64 |  |  |  |
Shares repurchased |  |  | $ 1,200 |  |  |  |
Remaining authorized shares repurchase amount |  |  | $ 1,800 |  |  |  |
Property, Plant and Equipment [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest costs capitalized |  |  |  |  | $ 26 | $ 15 |
Line of Credit | PT-FI Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 667 |  |  |
Line of Credit | PT-FI Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  |  |  | 603 |  | $ 432
Long-term Debt, Gross |  |  |  |  | 614 |  |
Line of Credit | Letter of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Letter of credit |  |  |  |  | 8 |  |
Revolving credit facility, availability |  |  |  |  | 1,500 |  |
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  |  |  | 0 |  |
Letter of credit |  |  |  | 333 |  |  |
Revolving credit facility, availability |  |  |  |  | 3,500 |  |
Line of Credit | Revolving Credit Facility | Maturing 2024 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Revolving credit facility, availability |  |  |  |  | 3,280 |  |
Line of Credit | Revolving Credit Facility | Maturing 2023 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Revolving credit facility, availability |  |  |  |  | $ 220 |  |
Line of Credit | Unsecured Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, principal |  |  |  | $ 1,000 |  |  |
Debt instrument, term |  |  |  | 5 years |  |  |
Senior Notes | PT-FI | Subsequent event |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, principal |  | $ 3,000 |  |  |  |  |
Proceeds from debt, net of issuance costs |  | 2,990 |  |  |  |  |
Senior Notes | PT-FI | 4.763% Senior Notes Due 2027 | Subsequent event |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, principal |  | 750 |  |  |  |  |
Senior Notes | PT-FI | 5.315% Senior Notes Due 2032 | Subsequent event |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, principal |  | 1,500 |  |  |  |  |
Senior Notes | PT-FI | 6.200% Senior Notes Due 2052 | Subsequent event |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, principal |  | $ 750 |  |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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